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GEMMOLOGICAL PROPERTIES
Tanzanite
Family: |
Zoisite |
Crystal System: |
Orthorhombic |
Specific Gravity: |
3.10-3.38 |
Hardness: |
6 - 6.5 |
Refrative Index: |
1.69 - 1.70 |
Chemical Composition: |
(Ca2Al3(SiO4)(Si2O7)O(OH) |
Birefringence: |
0.006-0.018 |
Pleochroism: |
Dichroism or Trichroism |
Lustre: |
Vitreous |
Fracture: |
Uneven, Chonchoidal |
Cleavage: |
010 - Perfect;100 - Imperfect |
This gemmological data has been provided by an external consultant. If you notice any errors or omissions - or if you would like to offer a suggestion to improve this service - please contact: webmaster@ajtd.com.au |
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